Anomaly Study Reveal

With this mod, Anomaly research projects are unlocked by studying their corresponding entities instead of seeing them. You can set the amount of study required in mod options.

Some entities are not studiable (eg. blood rain) and their research unlock is unaffected.
This makes the game a lot harder, especially with regards to ghouls, which can be hard to capture and encounter again. Either use a mod that lets you use targeted melee attacks, other ways to disable targets, or set up your scenario with regular ghoul attacks.

Other entity mods should be compatible.